There's a minor spacing error in the diet of the larvae.
"smaller specimen": Specimens.
"utilized the Uktank": Utilize the Uktank.
How would the bands of tissue reinforced with calcium carbonate work?
"Crevasse", juduging by a quick check, is a deep open crack, especially one in a glacier. You probably meant "crevice".
The males don't starve to death prior to the eggs hatching, right? I figure the males regularly starving to death would be bad if they couldn't protect the eggs for at least the majority of their incubation time. How often does "regularly" occur? How would this defend-to-death behavior occur? Are the Drake Uktank eggs really tasty and/or vulnerable?